A computational approach for flow-acoustic coupling in closed side branches

The Journal of the Acoustical Society of America
P M RadavichJ M Novak

Abstract

The quarter-wave resonator, which produces a narrow band of high acoustic attenuation at regularly spaced frequency intervals, is a common type of silencer used in ducts. The presence of mean flow in the main duct, however, is likely to promote an interaction between these acoustic resonances and the flow. The coupling for some discrete flow conditions leads to the production of both large wave amplitudes in the side branch and high noise levels in the main duct, thereby transforming the quarter-wave silencer into a noise generator. The present approach employs computational fluid dynamics (CFD) to model this complex interaction between the flow and acoustic resonances at low Mach number by solving the unsteady, turbulent, and compressible Navier-Stokes equations. Comparisons between the present computations and the experiments of Ziada [PVP-Vol. 258, ASME, 35-59 (1993)] for a system with two coaxial side branches show that the method is capable of reproducing the physics of the flow-acoustic coupling and predicting the flow conditions when the coupling occurs. The theory of Howe [IMA J. Appl. Math. 32, 187-209 (1984)] is then employed to determine the location and timing of the acoustic power production during a cycle.

References

Oct 27, 2001·Diabetic Medicine : a Journal of the British Diabetic Association·B FrankeM H Hatem
Dec 12, 2007·The Journal of Neuropsychiatry and Clinical Neurosciences·Brendan T CarrollCamilo Muñoz

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Citations

Dec 16, 2004·Journal of Physiological Anthropology and Applied Human Science·Kyoji Fujiwara, Li Feng Pang
Jun 26, 2003·The Journal of the Acoustical Society of America·S K Tang, F Y C Li
Feb 5, 2004·The Journal of the Acoustical Society of America·S K Tang
Mar 8, 2013·The Journal of the Acoustical Society of America·Z B LuL Cheng
Oct 26, 2010·The Journal of the Acoustical Society of America·A T de Jong, H Bijl
Jul 17, 2009·The Journal of the Acoustical Society of America·M M ZhangY Zhou
Jul 10, 2021·The Journal of the Acoustical Society of America·Peng WangYingzheng Liu

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